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  • Silverlight 4 Training Kit

    - by ScottGu
    We recently released a new free Silverlight 4 Training Kit that walks you through building business applications with Silverlight 4.  You can browse the training kit online or alternatively download an entire offline version of the training kit.  The training material is structured on teaching how to use the new Silverlight 4 features to build an end to end business application. The training kit includes 8 modules, 25 videos, and several hands on labs. Below is a breakdown and links to all of the content. [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] Module 1: Introduction Click here to watch this module. In this video John Papa and Ian Griffiths discuss the key areas that the Building Business Applications with Silverlight 4 course focuses on. This module is the overview of the course and covers many key scenarios that are faced when building business applications, and how Silverlight can help address them. Module 2: WCF RIA Services Click here to explore this module. In this lab, you will create a web site for managing conferences that will be the basis for the other labs in this course. Don’t worry if you don’t complete a particular lab in the series – all lab manual instructions are accompanied by completed solutions, so you can either build your own solution from start to finish, or dive straight in at any point using the solutions provided as a starting point. In this lab you will learn how to set up WCF RIA Services, create bindings to the domain context, filter using the domain data source, and create domain service queries. Online Link Download Source Download Lab Document Videos Module 2.1 - WCF RIA Services Ian Griffiths sets up the Entity Framework and WCF RIA Services for the sample Event Manager application for the course. He covers how to set up the services, how the Domain Services work and the role that the DomainContext plays in the sample application. He also reviews the metadata classes and integrating the navigation framework. Module 2.2 – Using WCF RIA Services to Edit Entities Ian Griffiths discusses how he adds the ability to edit and create individual entities with the features built into WCF RIA Services into the sample Event Manager application. He covers data binding fundamentals, IQueryable, LINQ, the DomainDataSource, navigation to a single entity using the navigation framework, and how to use the Visual Studio designer to do much of the work . Module 2.3 – Showing Master/Details Records Using WCF RIA Services Ian Griffiths reviews how to display master/detail records for the sample Event Manager application using WCF RIA Services. He covers how to use the Include attribute to indicate which elements to serialize back to the client. Ian also demonstrates how to use the Data Sources window in the designer to add and bind controls to specific data elements. He wraps up by showing how to create custom services to the Domain Services. Module 3 – Authentication, Validation, MVVM, Commands, Implicit Styles and RichTextBox Click here to visit this module. This lab demonstrates how to build a login screen, integrate ASP.NET authentication, and perform validation on data elements. Model-View-ViewModel (MVVM) is introduced and used in this lab as a pattern to help separate the UI and business logic. You will also learn how to use implicit styling and the new RichTextBox control. Online Link Download Source Download Lab Document Videos Module 3.1 – Authentication Ian Griffiths covers how to integrate a login screen and authentication into the sample Event Manager application. Ian shows how to use the ASP.NET authentication and integrate it into WCF RIA Services and the Silverlight presentation layer. Module 3.2 – MVVM Ian Griffiths covers how to Model-View-ViewModel (MVVM) patterns into the sample Event Manager application. He discusses why MVVM exists, what separated presentation means, and why it is important. He shows how to connect the View to the ViewModel, why data binding is important in this symbiosis, and how everything fits together in the overall application. Module 3.3 –Validation Ian Griffiths discusses how validation of user input can be integrated into the sample Event Manager application. He demonstrates how to use the DataAnnotations, the INotifyDataErrorInfo interface, binding markup extensions, and WCF RIA Services in concert to achieve great validation in the sample application. He discusses how this technique allows for property level validation, entity level validation, and asynchronous server side validation. Module 3.4 – Implicit Styles Ian Griffiths discusses how why implicit styles are important and how they can be integrated into the sample Event Manager application. He shows how implicit styles defined in a resource dictionary can be applied to all elements of a particular kind throughout the application. Module 3.5 – RichTextBox Ian Griffiths discusses how the new RichTextBox control and it can be integrated into the sample Event Manager application. He demonstrates how the RichTextBox can provide editing for the event information and how it can display the rich text for selection and copying. Module 4 – User Profiles, Drop Targets, Webcam and Clipboard Click here to visit this module. This lab builds new features into the sample application to take the user's photo. It teaches you how to use the webcam to capture an image, use Silverlight as a drop target, and take advantage of programmatic access to the clipboard. Link Download Source Download Lab Document Videos Module 4.1 – Webcam Ian Griffiths demonstrates how the webcam adds value to the sample Event Manager application by capturing an image of the attendee. He discusses the VideoCaptureDevice, the CaptureDviceConfiguration, and the CaptureSource classes and how they allow audio and video to be captured so you can grab an image from the capture device and save it. Module 4.2 - Drag and Drop in Silverlight Ian Griffiths demonstrates how to capture and handle the Drop in the sample Event Manager application so the user can drag a photo from a file and drop it into the application. Ian reviews the AllowDrop property, the Drop event, how to access the file that can be dropped, and the other drag related events. He also reviews how to make this work across browsers and the challenges for this. Module 5 – Schedule Planner and Right Mouse Click Click here to visit this module. This lab builds on the application to allow grouping in the DataGrid and implement right mouse click features to add context menu support. Link Download Source Download Lab Document Videos Module 5.1 – Grouping and Binding Ian Griffiths demonstrates how to use the grouping features for data binding in the DataGrid and how it applies to the sample Event Manager application. He reviews the role of the CollectionViewSource in grouping, customizing the templates for headers, and how to work with grouping with ItemsControls. Module 5.2 – Layout Visual States Ian Griffiths demonstrates how to use the Fluid UI animation support for visual states in the ListBox control DataGrid and how it applies to the sample Event Manager application. He reviews the 3 visual states of BeforeLoaded, AfterLoaded, and BeforeUnloaded. Module 5.3 – Right Mouse Click Ian Griffiths demonstrates how to add support for handling the right mouse button click event to display a context menu for the Event Manager application. He demonstrates how to handle the event, show a custom context menu control, and integrate it into the scheduling portion of the application. Module 6 – Printing the Schedule Click here to visit this module. This lab teaches how to use the new printing features in Silverlight 4. The lab walks through the PrintDocument class and the ViewBox control, while showing how to print multiple pages of content using them. Link Download Source Download Lab Document Videos Module 6.1 – Printing and the Viewbox Ian Griffiths demonstrates how to add the ability to print the schedule to the sample Event Manager application. He walks through the importance of the PrintDocument class and its members. He also shows how to handle printing the visual tree and how the ViewBox control can help. Module 6.2 – Multi Page Printing Ian Griffiths expands on his printing discussion by showing how to handle printing multiple pages of content for the sample Event Manager application. He shows how to paginate the content and points out various tips to keep in mind when determining the printable area. Module 7 – Running the Event Dashboard Out of Browser Click here to visit this module. This lab builds a dashboard for the sample application while explaining the fundamentals of the out of browser features, how to handle authentication, displaying notifications (toasts), and how to use native integration to use COM Interop with Silverlight. Link Download Source Download Lab Document Videos Module 7.1 – Out of Browser Ian Griffiths discusses the role of an Out of Browser application for administrators to manage the events and users in the sample Event Manager application. He discusses several reasons why out of browser applications may better suit your needs including custom chrome, toasts, window placement, cross domain access, and file access. He demonstrates the basic technique to take your application and make it work out of browser using the tools. Module 7.2 – NotificationWindow (Toasts) for Elevated Trust Out of Browser Applications Ian Griffiths discusses the how toasts can be used in the sample Event Manager application to show information that may require the user's attention. Ian covers how to create a toast using the NotificationWindow, security implications, and how to make the toast appear as needed. Module 7.3 – Out of Browser Window Placement Ian Griffiths discusses the how to manage the window positioning when building an out of browser application, handling the windows state, and controlling and handling activation of the window. Module 7.4 – Out of Browser Elevated Trust Application Overview Ian Griffiths discusses the implications of creating trusted out of browser application for the Event Manager sample application. He reviews why you might want to use elevated trust, what features is opens to you, and how to take advantage of them. Topics Ian covers include the dynamic keyword in C# 4, the AutomationFactory class, the API to check if you are in a trusted application, and communicating with Excel. Module 8 – Advanced Out of Browser and MEF Click here to visit this module. This hands-on lab walks through the creation of a trusted out of browser application and the new functionality that comes with that. You will learn to use COM Automation, handle the window closing event, set custom window chrome, digitally sign your Silverlight out of browser trusted application, create a silent install option, and take advantage of MEF. Link Download Source Download Lab Document Videos Module 8.1 – Custom Window Chrome for Elevated Trust Out of Browser Applications Ian Griffiths discusses how to replace the standard operating system window chrome with customized chrome for an elevated trusted out of browser application. He covers how it is important to handle close, resize, minimize, and maximize events. Ian mentions that the tooling was not ready when he shot this video, but the good news is that the tooling now supports setting the custom chrome directly from the property page for the Silverlight application. Module 8.2 – Window Closing Event for Out of Browser Applications Ian Griffiths discusses the WindowClosing event and how to handle and optionally cancel the event. Module 8.3 – Silent Install of Out of Browser Applications Ian Griffiths discusses how to use the SLLauncher executable to install an out of browser application. He discusses the optional command line switches that can be set including how the emulate switch can help you emulate the install process. Ian also shows how to setup a shortcut for the application and tell the application where it should look for future updates online. Module 8.4 – Digitally Signing Out of Browser Application Ian Griffiths discusses how and why to digitally sign an out of browser application using the signtool program. He covers what trusted certificates are, the implications of signing (or not signing), and the effect on the user experience. Module 8.5 – The Value of MEF with Silverlight Ian Griffiths discusses what MEF is, how your application can benefit from it, and the fundamental features it puts at your disposal. He covers the 3 step import, export and compose process as well as how to dynamically import XAP files using MEF. Summary As you can probably tell from the long list above – this series contains a ton of great content, and hopefully provides a nice end-to-end walkthrough that helps explain how to take advantage of Silverlight 4 (and all its new features).  Hope this helps, Scott

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  • Save Points

    - by raghu.yadav
    Explicit save point : Requires an end user action before a bounded or unbounded task flow creates a save point. For example, an end user clicks a button that invokes a method call activity that, in turn, creates a save point Implicit save point : can only originate from a bounded task flow if 1) A session times out due to end user inactivity 2) An end user logs out without saving the data 3) An end user closes the only browser window, thus logging out of the application 4) An end user navigates away from the current application using control flow rules (for example, uses a goLink component to go to an external URL) and having unsaved data. good usecases and examples given by frank/biemond and on implicit save points http://www.oracle.com/technology/products/jdev/tips/fnimphius/cancelForm/cancelForm_wsp.html?_template=/ocom/print http://biemond.blogspot.com/2008/04/automatically-save-transactions-with.html

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  • Historical origins of Scala implicits

    - by Frank
    Scala has been called complex with its rich feature set by many of my colleagues and some even blamed all those new features of it. While most programmers are aware of the OO-features, and at least the decent ones also know about functional programming, there is one feature in particular in Scala for which I am not aware of its historical origins. Given that a major mantra of our profession is to not reinvent the wheel, I am rather confident, that Scala does not have any actual unheard-of-before features, but I stand to be corrected on this one if necessary. To get to the actual question, while I am aware of the origins of most of Scala's features I have never seen something like its implicit declarations before. Are there other (older!) languages out there which also provide this feature? Does it make sense to distinguish the different cases of implicits (as they may originate from different sources), namely implict conversions and implicit parameters?

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  • Why can't Java/C# implement RAII?

    - by mike30
    Question: Why can't Java/C# implement RAII? Clarification: I am aware the garbage collector is not deterministic. So with the current language features it is not possible for an object's Dispose() method to be called automatically on scope exit. But could such a deterministic feature be added? My understanding: I feel an implementation of RAII must satisfy two requirements: 1. The lifetime of a resource must be bound to a scope. 2. Implicit. The freeing of the resource must happen without an explicit statement by the programmer. Analogous to a garbage collector freeing memory without an explicit statement. The "implicitness" only needs to occur at point of use of the class. The class library creator must of course explicitly implement a destructor or Dispose() method. Java/C# satisfy point 1. In C# a resource implementing IDisposable can be bound to a "using" scope: void test() { using(Resource r = new Resource()) { r.foo(); }//resource released on scope exit } This does not satisfy point 2. The programmer must explicitly tie the object to a special "using" scope. Programmers can (and do) forget to explicitly tie the resource to a scope, creating a leak. In fact the "using" blocks are converted to try-finally-dispose() code by the compiler. It has the same explicit nature of the try-finally-dispose() pattern. Without an implicit release, the hook to a scope is syntactic sugar. void test() { //Programmer forgot (or was not aware of the need) to explicitly //bind Resource to a scope. Resource r = new Resource(); r.foo(); }//resource leaked!!! I think it is worth creating a language feature in Java/C# allowing special objects that are hooked to the stack via a smart-pointer. The feature would allow you to flag a class as scope-bound, so that it always is created with a hook to the stack. There could be a options for different for different types of smart pointers. class Resource - ScopeBound { /* class details */ void Dispose() { //free resource } } void test() { //class Resource was flagged as ScopeBound so the tie to the stack is implicit. Resource r = new Resource(); //r is a smart-pointer r.foo(); }//resource released on scope exit. I think implicitness is "worth it". Just as the implicitness of garbage collection is "worth it". Explicit using blocks are refreshing on the eyes, but offer no semantic advantage over try-finally-dispose(). Is it impractical to implement such a feature into the Java/C# languages? Could it be introduced without breaking old code?

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  • How to fix skipping/stuttering audio in Google Chrome

    - by Droid
    If I play Google Music, or a Youtube video in the Chrome browser, and then open a new tab and start typing the address bar, the audio will quickly cut in and out as I am typing (with almost every letter I type). It also is choppy if I play the video and start typing in the start menu. I can not repeat this behavior using internet explorer. Based on that Im thinking that it maybe a problem with the version of flash Chrome is using but I'm not sure. Any ideas? Im running 32 bit windows 7, i.e. 9, and chrome 23.0 pc is a lenovo t43p. I have the latest sound drivers. i.e. is using flash 11.5.502. chrome is using : Adobe Flash Player - Version: 11.5.31.2 Only one (this) plugin is listed for flash in the chrome plugins list.

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  • glib2 64-bit compile fails on Solaris 10

    - by Aaron
    I'm encountering a problem building glib-2.26.1 on a Solaris 10 box - 64-bit. Goo diligence doesn't turn anything up, but no matter what I do the build fails in the same way. I've tried using the Sun Studio compiler, gcc (SFW) to no avail. When I compile I get the following error: [root@foo glib-2.26.1]$ export CC=/opt/solstudio12.2/bin/cc [root@foo glib-2.26.1]$ export CFLAGS="-m64" ...configure goes normally... [root@foo glib-2.26.1]$ make ...snip... source='gatomic.c' object='gatomic.lo' libtool=yes \ DEPDIR=.deps depmode=none /bin/bash ../depcomp \ /bin/bash ../libtool --tag=CC --mode=compile /opt/solstudio12.2/bin/cc -DHAVE_CONFIG_H -I. -I.. -I.. -I../glib -I../glib -I.. -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DG_DISABLE_DEPRECATED -DGLIB_COMPILATION -DPCRE_STATIC -DG_DISABLE_SINGLE_INCLUDES -D_REENTRANT -D_PTHREADS -m64 -c -o gatomic.lo gatomic.c libtool: compile: /opt/solstudio12.2/bin/cc -DHAVE_CONFIG_H -I. -I.. -I.. -I../glib -I../glib -I.. -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DG_DISABLE_DEPRECATED -DGLIB_COMPILATION -DPCRE_STATIC -DG_DISABLE_SINGLE_INCLUDES -D_REENTRANT -D_PTHREADS -m64 -c gatomic.c -KPIC -DPIC -o .libs/gatomic.o "gatomic.c", line 885: warning: no explicit type given "gatomic.c", line 885: syntax error before or at: * "gatomic.c", line 885: warning: old-style declaration or incorrect type for: g_atomic_mutex "gatomic.c", line 906: warning: implicit function declaration: g_mutex_lock "gatomic.c", line 909: warning: implicit function declaration: g_mutex_unlock "gatomic.c", line 1155: warning: implicit function declaration: g_mutex_new "gatomic.c", line 1155: warning: improper pointer/integer combination: op "=" cc: acomp failed for gatomic.c make[4]: *** [gatomic.lo] Error 1 make[4]: Leaving directory `/root/glib-2.26.1/glib' make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory `/root/glib-2.26.1/glib' make[2]: *** [all] Error 2 make[2]: Leaving directory `/root/glib-2.26.1/glib' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/root/glib-2.26.1' make: *** [all] Error 2 Does anyone know where the build might be going wrong? Not sure where else to look here. Thanks.

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  • setting up git on cygwin - openssl

    - by user23020
    I'm trying to get git running in cygwin on a windows 7 machine I have git unpacked and the directory git-1.7.1.1 when i run make install from within that directory, I get CC fast-import.o In file included from builtin.h:4, from fast-import.c:147: git-compat-util.h:136:19: iconv.h: No such file or directory git-compat-util.h:140:25: openssl/ssl.h: No such file or directory git-compat-util.h:141:25: openssl/err.h: No such file or directory In file included from builtin.h:6, from fast-import.c:147: cache.h:9:21: openssl/sha.h: No such file or directory In file included from fast-import.c:156: csum-file.h:10: error: parse error before "SHA_CTX" csum-file.h:10: warning: no semicolon at end of struct or union csum-file.h:15: error: 'crc32' redeclared as different kind of symbol /usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here csum-file.h:15: error: 'crc32' redeclared as different kind of symbol /usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here csum-file.h:17: error: parse error before '}' token fast-import.c: In function `store_object': fast-import.c:995: error: `SHA_CTX' undeclared (first use in this function) fast-import.c:995: error: (Each undeclared identifier is reported only once fast-import.c:995: error: for each function it appears in.) fast-import.c:995: error: parse error before "c" fast-import.c:1000: warning: implicit declaration of function `SHA1_Init' fast-import.c:1000: error: `c' undeclared (first use in this function) fast-import.c:1001: warning: implicit declaration of function `SHA1_Update' fast-import.c:1003: warning: implicit declaration of function `SHA1_Final' fast-import.c: At top level: fast-import.c:1118: error: parse error before "SHA_CTX" fast-import.c: In function `truncate_pack': fast-import.c:1120: error: `to' undeclared (first use in this function) fast-import.c:1126: error: dereferencing pointer to incomplete type fast-import.c:1127: error: dereferencing pointer to incomplete type fast-import.c:1128: error: dereferencing pointer to incomplete type fast-import.c:1128: error: `ctx' undeclared (first use in this function) fast-import.c: In function `stream_blob': fast-import.c:1140: error: `SHA_CTX' undeclared (first use in this function) fast-import.c:1140: error: parse error before "c" fast-import.c:1154: error: `pack_file_ctx' undeclared (first use in this functio n) fast-import.c:1154: error: dereferencing pointer to incomplete type fast-import.c:1160: error: `c' undeclared (first use in this function) make: *** [fast-import.o] Error 1 I'm guessing that most of these errors are due to the iconv.h and openssl files which apparently are missing, but I can't figure out how I'm supposed to install those (if I am), or if there is some other way to get around this.

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  • Unable to compile netmap on Fedora 32 bit

    - by John Elf
    This is the error everytime I try to install netmap: Can someone let me know how to isntall the same on e1000e or ixgbe. I have kernel header and source installed. [root@localhost e1000]# make KSRC=/usr/src/kernels/2.6.35.6-45.fc14.i686/ make -C /usr/src/kernels/2.6.35.6-45.fc14.i686/ M=/media/sf_Shared/netmap-linux/net/e1000 modules make[1]: Entering directory /usr/src/kernels/2.6.35.6-45.fc14.i686' CC [M] /media/sf_Shared/netmap-linux/net/e1000/e1000_main.o /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_setup_tx_resources’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1485:2: error: implicit declaration of function ‘vzalloc’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1485:20: warning: assignment makes pointer from integer without a cast /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_setup_rx_resources’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1680:20: warning: assignment makes pointer from integer without a cast /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_tx_csum’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:2780:2: error: implicit declaration of function ‘skb_checksum_start_offset’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_rx_checksum’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:3689:2: error: implicit declaration of function ‘skb_checksum_none_assert’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_restore_vlan’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:4617:23: error: ‘VLAN_N_VID’ undeclared (first use in this function) /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:4617:23: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [/media/sf_Shared/netmap-linux/net/e1000/e1000_main.o] Error 1 make[1]: *** [_module_/media/sf_Shared/netmap-linux/net/e1000] Error 2 make[1]: Leaving directory/usr/src/kernels/2.6.35.6-45.fc14.i686' make: * [all] Error 2

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  • How do I create a Launcher in Ubuntu 9.10 that runs a shell script?

    - by mkelley33
    Here's my situation: New to Ubuntu (just installed 9.10 Karmic Koala 64 bit) Purpose: to easily run PyCharm without too much typing (ie. cd... ./pycharm.sh) Want to create desktop Launcher instead of terminal & typing (without resorting to the "Run in Terminal" option) Tried to create Launcher to executes .sh script in Document directory Right-clicked Desktop Create Launcher a. Type == Application; Browse [insert absolute path to .sh script]; no luck b. Type == Application in Terminal; Browse ...ditto I'm open to any other alternatives that involve as little typing as possible. I would like to just start Ubuntu, click Launcher icons, and have terminals spring to life, running the intended scripts. Crazy? No. Lazy? Probably. Productive? Hopefully :)

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  • setting up git on cygwin - openssl

    - by Pete Field
    I'm trying to get git running in cygwin on a windows 7 machine I have git unpacked and the directory git-1.7.1.1 when i run make install from within that directory, I get CC fast-import.o In file included from builtin.h:4, from fast-import.c:147: git-compat-util.h:136:19: iconv.h: No such file or directory git-compat-util.h:140:25: openssl/ssl.h: No such file or directory git-compat-util.h:141:25: openssl/err.h: No such file or directory In file included from builtin.h:6, from fast-import.c:147: cache.h:9:21: openssl/sha.h: No such file or directory In file included from fast-import.c:156: csum-file.h:10: error: parse error before "SHA_CTX" csum-file.h:10: warning: no semicolon at end of struct or union csum-file.h:15: error: 'crc32' redeclared as different kind of symbol /usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here csum-file.h:15: error: 'crc32' redeclared as different kind of symbol /usr/include/zlib.h:1285: error: previous declaration of 'crc32' was here csum-file.h:17: error: parse error before '}' token fast-import.c: In function `store_object': fast-import.c:995: error: `SHA_CTX' undeclared (first use in this function) fast-import.c:995: error: (Each undeclared identifier is reported only once fast-import.c:995: error: for each function it appears in.) fast-import.c:995: error: parse error before "c" fast-import.c:1000: warning: implicit declaration of function `SHA1_Init' fast-import.c:1000: error: `c' undeclared (first use in this function) fast-import.c:1001: warning: implicit declaration of function `SHA1_Update' fast-import.c:1003: warning: implicit declaration of function `SHA1_Final' fast-import.c: At top level: fast-import.c:1118: error: parse error before "SHA_CTX" fast-import.c: In function `truncate_pack': fast-import.c:1120: error: `to' undeclared (first use in this function) fast-import.c:1126: error: dereferencing pointer to incomplete type fast-import.c:1127: error: dereferencing pointer to incomplete type fast-import.c:1128: error: dereferencing pointer to incomplete type fast-import.c:1128: error: `ctx' undeclared (first use in this function) fast-import.c: In function `stream_blob': fast-import.c:1140: error: `SHA_CTX' undeclared (first use in this function) fast-import.c:1140: error: parse error before "c" fast-import.c:1154: error: `pack_file_ctx' undeclared (first use in this functio n) fast-import.c:1154: error: dereferencing pointer to incomplete type fast-import.c:1160: error: `c' undeclared (first use in this function) make: *** [fast-import.o] Error 1 I'm guessing that most of these errors are due to the iconv.h and openssl files which apparently are missing, but I can't figure out how I'm supposed to install those (if I am), or if there is some other way to get around this.

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  • Pressing 'Enter' doesn't really work in Firefox

    - by inkedmn
    When I'm typing just about anywhere in Firefox on OSX and press enter, it simply doesn't do anything. This includes typing in a textarea element (which should take the cursor to the next line), in a search form (which should submit the form). I'm typing this very question in Firefox right now and I'm unable to advance the cursor to the beginning of the next line. I have no clue what I did to make this happen, but it's kinda driving me insane. This is Firefox 3.6.3 under Mac OS X 10.6. Thanks!

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  • ssh (openSSH) questions

    - by Camran
    I have ubuntu 9.10 server. Firstly, is OpenSSH the same as SSHD? Secondly, In the terminal when typing whereis sshd i get this: whereis sshd /usr/sbin/sshd Also when typing whereis openssh i get this: whereis openssh /usr/lib/openssh How do I know if I have openssh? Also, some tutorials online suggest opening sshd_config, so when typing this: whereis sshd_config /usr/share/man/man5/sshd_config.5.gz // I get this... What should I do, because as you have answered my other Q about security, you have pointed out that it is the way you configure your ssh and etc which is important. Is there any guide for this? How should I configure this? I will be the only user for this server btw... If you need more input let me know and I will update this Q. Thanks

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  • ssh (openSSH) questions

    - by Camran
    I have ubuntu 9.10 server. Firstly, is OpenSSH the same as SSHD? Secondly, In the terminal when typing whereis sshd i get this: whereis sshd /usr/sbin/sshd Also when typing whereis openssh i get this: whereis openssh /usr/lib/openssh How do I know if I have openssh? Also, some tutorials online suggest opening sshd_config, so when typing this: whereis sshd_config /usr/share/man/man5/sshd_config.5.gz // I get this... What should I do, because as you have answered my other Q about security, you have pointed out that it is the way you configure your ssh and etc which is important. Is there any guide for this? How should I configure this? I will be the only user for this server btw... If you need more input let me know and I will update this Q. Thanks

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  • Problems Using CloudFlare On Blogger

    - by the_archer
    Here's the situation. I got a TLD for my blogger blog and set it up using the instructions from blogger. Blogger asks to: Add two CNAME records. For the first CNAME, where it says Name, Label or Host enter "www" and where it says Destination, Target orPoints To enter "ghs.google.com" . For the second CNAME, enter "NHRILA4K2RJG" as the Name and "gv-GQMUMYGHAMJWECXFLJXVXABIV23C55JIPNIAVD5IGFSXT653O5GA.domainverify.googlehosted.com." I did that on my domain host, and everything was working smoothly. Here's the things that happened: Typing myblog.blogspot.com in the address bar brought me to my new address www.mynewaddress.tld Typing my newaddress.tld brings me to www.mynewaddress.tld Now, I went through the instruction to setup CloudFlare and did everything as required. I saw that CloudFlare is active and working on my TLD www.mynewaddress.tld, however, when I am typing the blogspot address, i.e. myblog.blogspot.com, it's showing a notice that the blog is not hosted on blogger and that I should click "yes" to get redirected to the new website. However, the blog is still on blogger. I think the problem might be with this particular CNAME record Google asks to create, which I did not find imported to the CloudFlare nameservers: For the second CNAME, enter "NHRILA4K2RJG" as the Name and "gv-GQMUMYGHAMJWECXFLJXVXABIV23C55JIPNIAVD5IGFSXT653O5GA.domainverify.googlehosted.com." So I create that CNAME and added it to the CloudFlare panel. My question is - is that what will help Google determine that my blog is still hosted on Blogger? If so, should I turn off CloudFlare for that particular CNAME record or turn it on? Any help is very much appreciated :)

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  • Where&rsquo;s my start button?

    - by Dennis Vroegop
    I have to be honest here for a moment. The one thing people most complain about when they talk about Windows 8 is that they miss the Start Button. You know, that dreaded thing that everybody hated when it was introduced… I usually don’t go into these kinds of discussions unless I am personally involved but this one I cannot let go. Why are people doing this? Windows 8 is a great OS. They have changed, updated and perfected so many things so there is enough to talk or write about. Yet, all articles or discussions come down to “Where’s my start button?” In order to save myself from having to explain this every single time I wrote this post and from now on I will simply refer to this blog when I get asked that question. Here it is. Your start menu is there. It’s right in front of your nose. It’s two dimensional, it’s got huge buttons (although they are more than just buttons, they’re alive and therefore called Live Tiles). Just go through those tiles and click what ever you want to start up. Don’t want to look for an item? Just start typing. Really it is that simple. When you are on the start screen just start typing (part of) the name of the program you want and you’ll find it.  As you see in the attached example I started typing “word” and it found Word, Wordfeud, Wordament etc. If you want to find something else besides a program (say you want to change the region you’re in) just click on Settings (it will already show you how many hits there are in that section). People, my request is: dive into something before you complain about it. Look around. This feature is so much easier to use than the old stuff. But you have to know about it. So. I won’t get into this discussion anymore.

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  • Strategies for managUse of types in Python

    - by dave
    I'm a long time programmer in C# but have been coding in Python for the past year. One of the big hurdles for me was the lack of type definitions for variables and parameters. Whereas I totally get the idea of duck typing, I do find it frustrating that I can't tell the type of a variable just by looking at it. This is an issue when you look at someone else's code where they've used ambiguous names for method parameters (see edit below). In a few cases, I've added asserts to ensure parameters comply with an expected type but this goes against the whole duck typing thing. On some methods, I'll document the expected type of parameters (eg: list of user objects), but even this seems to go against the idea of just using an object and let the runtime deal with exceptions. What strategies do you use to avoid typing problems in Python? Edit: Example of the parameter naming issues: If our code base we have a task object (ORM object) and a task_obj object (higher level object that embeds a task). Needless to say, many methods accept a parameter named 'task'. The method might expect a task or a task_obj or some other construct such as a dictionary of task properties - it is not clear. It is them up to be to look at how that parameter is used in order to work out what the method expects.

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  • Strategies for managing use of types in Python

    - by dave
    I'm a long time programmer in C# but have been coding in Python for the past year. One of the big hurdles for me was the lack of type definitions for variables and parameters. Whereas I totally get the idea of duck typing, I do find it frustrating that I can't tell the type of a variable just by looking at it. This is an issue when you look at someone else's code where they've used ambiguous names for method parameters (see edit below). In a few cases, I've added asserts to ensure parameters comply with an expected type but this goes against the whole duck typing thing. On some methods, I'll document the expected type of parameters (eg: list of user objects), but even this seems to go against the idea of just using an object and let the runtime deal with exceptions. What strategies do you use to avoid typing problems in Python? Edit: Example of the parameter naming issues: If our code base we have a task object (ORM object) and a task_obj object (higher level object that embeds a task). Needless to say, many methods accept a parameter named 'task'. The method might expect a task or a task_obj or some other construct such as a dictionary of task properties - it is not clear. It is them up to be to look at how that parameter is used in order to work out what the method expects.

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  • Code better with JustCode Q1 SP1

    We've just uploaded the Service Pack 1 for JustCode so feel free to log in to your Telerik accounts and download JustCode. Earlier this week Visual Studio 2010 RTM was released and we are happy to announce that this version of JustCode fully supports it. Other areas of interest in this release are the typing assistance behavior and JavaScript formatting. We also further optimized JustCodes memory usage and speed. Youll find the full release notes for the Service Pack here.  Visual Studio 2010 changes As Visual Studio is now officially out we now fully support its final version as well as the new .NET 4.0 framework features. Typing Assistance improvements As JustCodes first official release approached we started getting an increasing number of requests for a typing assistance feature. In spite of being at a fairly advanced stage of our development cycle we managed to squeeze in a basic ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Is there a good date/time API available for Scala?

    - by Erik Engbrecht
    I'm looking for something akin to JodaTime or JSR 310 for Scala that leverages nice Scala features such as operator overloading and doesn't rely on implicit conversions (I have an irrational fear of implicit conversions). I'm aware of http://github.com/jorgeortiz85/scala-time, but it just pimps JodaTime with implicits.

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  • How to solve - Illegal mix of collations in mysql?

    - by rocksolid
    Am getting the below error when trying to do a select through a Stored procedure in mysql. Illegal mix of collations (latin1_general_cs,IMPLICIT) and (latin1_general_ci,IMPLICIT) for operation '=' Any idea on what might be going wrong here? The collation of the table is latin1_general_ci and that of the column in the where clause is latin1_general_cs Thanks!

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  • Class destructor memory handling in C++

    - by wyatt
    What potential memory leaks won't an implicit destructor handle? I know that if you have anything stored on the heap it won't handle it, and if you have a connection to a file or a database, that needs to be handled manually. Is there anything else? What about, say, non-base data types like vectors? Also, in an explicit destructor, need you destroy non-heap variables which would have been destroyed by the implicit, or are they handled automatically? Thanks

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  • How do I install PyYAML into local install of Python?

    - by Daryl Spitzer
    I've installed Python 2.6.4 into (a subdirectory in) my home directory on a Linux machine with Python 2.3.4 pre-installed, because I need to run some code that I've decided would require too much work to make it run on 2.3.4. (I'm not on the sudoers list for that machine.) I was hoping I could run ~/Python-2.6.4/python setup.py install (from the PyYAML directory in my home directory, where I untarred the PyYAML sources) and it would be smart enough to install it into my local Python 2.6.4 install. But it's not. (See the P.S.) Is it possible to install PyYAML into my local Python install, so that "import yaml" will work when I invoke that Python? If so, how do I do that? P.S. Here's the output when I ran ~/Python-2.6.4/python setup.py install: running install running build running build_py creating build/lib.linux-ppc64-2.6 creating build/lib.linux-ppc64-2.6/yaml copying lib/yaml/composer.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/nodes.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/dumper.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/resolver.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/events.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/emitter.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/error.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/loader.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/cyaml.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/scanner.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/__init__.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/serializer.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/reader.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/representer.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/constructor.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/tokens.py -> build/lib.linux-ppc64-2.6/yaml copying lib/yaml/parser.py -> build/lib.linux-ppc64-2.6/yaml running build_ext creating build/temp.linux-ppc64-2.6 checking if libyaml is compilable gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/dspitzer/Python-2.6.4/Include -I/home/dspitzer/Python-2.6.4 -c build/temp.linux-ppc64-2.6/check_libyaml.c -o build/temp.linux-ppc64-2.6/check_libyaml.o build/temp.linux-ppc64-2.6/check_libyaml.c:2:18: yaml.h: No such file or directory build/temp.linux-ppc64-2.6/check_libyaml.c: In function `main': build/temp.linux-ppc64-2.6/check_libyaml.c:5: error: `yaml_parser_t' undeclared (first use in this function) build/temp.linux-ppc64-2.6/check_libyaml.c:5: error: (Each undeclared identifier is reported only once build/temp.linux-ppc64-2.6/check_libyaml.c:5: error: for each function it appears in.) build/temp.linux-ppc64-2.6/check_libyaml.c:5: error: syntax error before "parser" build/temp.linux-ppc64-2.6/check_libyaml.c:6: error: `yaml_emitter_t' undeclared (first use in this function) build/temp.linux-ppc64-2.6/check_libyaml.c:8: warning: implicit declaration of function `yaml_parser_initialize' build/temp.linux-ppc64-2.6/check_libyaml.c:8: error: `parser' undeclared (first use in this function) build/temp.linux-ppc64-2.6/check_libyaml.c:9: warning: implicit declaration of function `yaml_parser_delete' build/temp.linux-ppc64-2.6/check_libyaml.c:11: warning: implicit declaration of function `yaml_emitter_initialize' build/temp.linux-ppc64-2.6/check_libyaml.c:11: error: `emitter' undeclared (first use in this function) build/temp.linux-ppc64-2.6/check_libyaml.c:12: warning: implicit declaration of function `yaml_emitter_delete' libyaml is not found or a compiler error: forcing --without-libyaml (if libyaml is installed correctly, you may need to specify the option --include-dirs or uncomment and modify the parameter include_dirs in setup.cfg) running install_lib creating /usr/local/lib/python2.6 error: could not create '/usr/local/lib/python2.6': Permission denied

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  • optimized search using ajax and keypress

    - by ooo
    i have the following code as i want to search a database as a user is typing into a textbox. This code below works fine but it seems a little inefficient as if a user is typing really fast, i am potentially doing many more searches than necessary. So if a user is typing in "sailing" i am searching on "sail", "saili", "sailin", and "sailing" i wanted to see if there was a way to detect any particular time between keypresses so only search if user stops typing for 500 milliseconds or something like this. is there a best practices for something like this? $('#searchString').keypress(function(e) { if (e.keyCode == 13) { var url = '/Tracker/Search/' + $("#searchString").val(); $.get(url, function(data) { $('div#results').html(data); $('#results').show(); }); } else { var existingString = $("#searchString").val(); if (existingString.length > 2) { var url = '/Tracker/Search/' + existingString; $.get(url, function(data) { $('div#results').html(data); $('#results').show(); }); } }

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  • Dynamic Types and DynamicObject References in C#

    - by Rick Strahl
    I've been working a bit with C# custom dynamic types for several customers recently and I've seen some confusion in understanding how dynamic types are referenced. This discussion specifically centers around types that implement IDynamicMetaObjectProvider or subclass from DynamicObject as opposed to arbitrary type casts of standard .NET types. IDynamicMetaObjectProvider types  are treated special when they are cast to the dynamic type. Assume for a second that I've created my own implementation of a custom dynamic type called DynamicFoo which is about as simple of a dynamic class that I can think of:public class DynamicFoo : DynamicObject { Dictionary<string, object> properties = new Dictionary<string, object>(); public string Bar { get; set; } public DateTime Entered { get; set; } public override bool TryGetMember(GetMemberBinder binder, out object result) { result = null; if (!properties.ContainsKey(binder.Name)) return false; result = properties[binder.Name]; return true; } public override bool TrySetMember(SetMemberBinder binder, object value) { properties[binder.Name] = value; return true; } } This class has an internal dictionary member and I'm exposing this dictionary member through a dynamic by implementing DynamicObject. This implementation exposes the properties dictionary so the dictionary keys can be referenced like properties (foo.NewProperty = "Cool!"). I override TryGetMember() and TrySetMember() which are fired at runtime every time you access a 'property' on a dynamic instance of this DynamicFoo type. Strong Typing and Dynamic Casting I now can instantiate and use DynamicFoo in a couple of different ways: Strong TypingDynamicFoo fooExplicit = new DynamicFoo(); var fooVar = new DynamicFoo(); These two commands are essentially identical and use strong typing. The compiler generates identical code for both of them. The var statement is merely a compiler directive to infer the type of fooVar at compile time and so the type of fooExplicit is DynamicFoo, just like fooExplicit. This is very static - nothing dynamic about it - and it completely ignores the IDynamicMetaObjectProvider implementation of my class above as it's never used. Using either of these I can access the native properties:DynamicFoo fooExplicit = new DynamicFoo();// static typing assignmentsfooVar.Bar = "Barred!"; fooExplicit.Entered = DateTime.Now; // echo back static values Console.WriteLine(fooVar.Bar); Console.WriteLine(fooExplicit.Entered); but I have no access whatsoever to the properties dictionary. Basically this creates a strongly typed instance of the type with access only to the strongly typed interface. You get no dynamic behavior at all. The IDynamicMetaObjectProvider features don't kick in until you cast the type to dynamic. If I try to access a non-existing property on fooExplicit I get a compilation error that tells me that the property doesn't exist. Again, it's clearly and utterly non-dynamic. Dynamicdynamic fooDynamic = new DynamicFoo(); fooDynamic on the other hand is created as a dynamic type and it's a completely different beast. I can also create a dynamic by simply casting any type to dynamic like this:DynamicFoo fooExplicit = new DynamicFoo(); dynamic fooDynamic = fooExplicit; Note that dynamic typically doesn't require an explicit cast as the compiler automatically performs the cast so there's no need to use as dynamic. Dynamic functionality works at runtime and allows for the dynamic wrapper to look up and call members dynamically. A dynamic type will look for members to access or call in two places: Using the strongly typed members of the object Using theIDynamicMetaObjectProvider Interface methods to access members So rather than statically linking and calling a method or retrieving a property, the dynamic type looks up - at runtime  - where the value actually comes from. It's essentially late-binding which allows runtime determination what action to take when a member is accessed at runtime *if* the member you are accessing does not exist on the object. Class members are checked first before IDynamicMetaObjectProvider interface methods are kick in. All of the following works with the dynamic type:dynamic fooDynamic = new DynamicFoo(); // dynamic typing assignments fooDynamic.NewProperty = "Something new!"; fooDynamic.LastAccess = DateTime.Now; // dynamic assigning static properties fooDynamic.Bar = "dynamic barred"; fooDynamic.Entered = DateTime.Now; // echo back dynamic values Console.WriteLine(fooDynamic.NewProperty); Console.WriteLine(fooDynamic.LastAccess); Console.WriteLine(fooDynamic.Bar); Console.WriteLine(fooDynamic.Entered); The dynamic type can access the native class properties (Bar and Entered) and create and read new ones (NewProperty,LastAccess) all using a single type instance which is pretty cool. As you can see it's pretty easy to create an extensible type this way that can dynamically add members at runtime dynamically. The Alter Ego of IDynamicObject The key point here is that all three statements - explicit, var and dynamic - declare a new DynamicFoo(), but the dynamic declaration results in completely different behavior than the first two simply because the type has been cast to dynamic. Dynamic binding means that the type loses its typical strong typing, compile time features. You can see this easily in the Visual Studio code editor. As soon as you assign a value to a dynamic you lose Intellisense and you see which means there's no Intellisense and no compiler type checking on any members you apply to this instance. If you're new to the dynamic type it might seem really confusing that a single type can behave differently depending on how it is cast, but that's exactly what happens when you use a type that implements IDynamicMetaObjectProvider. Declare the type as its strong type name and you only get to access the native instance members of the type. Declare or cast it to dynamic and you get dynamic behavior which accesses native members plus it uses IDynamicMetaObjectProvider implementation to handle any missing member definitions by running custom code. You can easily cast objects back and forth between dynamic and the original type:dynamic fooDynamic = new DynamicFoo(); fooDynamic.NewProperty = "New Property Value"; DynamicFoo foo = fooDynamic; foo.Bar = "Barred"; Here the code starts out with a dynamic cast and a dynamic assignment. The code then casts back the value to the DynamicFoo. Notice that when casting from dynamic to DynamicFoo and back we typically do not have to specify the cast explicitly - the compiler can induce the type so I don't need to specify as dynamic or as DynamicFoo. Moral of the Story This easy interchange between dynamic and the underlying type is actually super useful, because it allows you to create extensible objects that can expose non-member data stores and expose them as an object interface. You can create an object that hosts a number of strongly typed properties and then cast the object to dynamic and add additional dynamic properties to the same type at runtime. You can easily switch back and forth between the strongly typed instance to access the well-known strongly typed properties and to dynamic for the dynamic properties added at runtime. Keep in mind that dynamic object access has quite a bit of overhead and is definitely slower than strongly typed binding, so if you're accessing the strongly typed parts of your objects you definitely want to use a strongly typed reference. Reserve dynamic for the dynamic members to optimize your code. The real beauty of dynamic is that with very little effort you can build expandable objects or objects that expose different data stores to an object interface. I'll have more on this in my next post when I create a customized and extensible Expando object based on DynamicObject.© Rick Strahl, West Wind Technologies, 2005-2012Posted in CSharp  .NET   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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